CN105732374B - A kind of method of 3,4,5-tri-methoxybenzoate of one-step synthesis method - Google Patents
A kind of method of 3,4,5-tri-methoxybenzoate of one-step synthesis method Download PDFInfo
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- CN105732374B CN105732374B CN201610063183.0A CN201610063183A CN105732374B CN 105732374 B CN105732374 B CN 105732374B CN 201610063183 A CN201610063183 A CN 201610063183A CN 105732374 B CN105732374 B CN 105732374B
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000001308 synthesis method Methods 0.000 title claims abstract description 17
- SJSOFNCYXJUNBT-UHFFFAOYSA-N 3,4,5-trimethoxybenzoic acid Chemical compound COC1=CC(C(O)=O)=CC(OC)=C1OC SJSOFNCYXJUNBT-UHFFFAOYSA-N 0.000 title claims abstract description 10
- LNTHITQWFMADLM-UHFFFAOYSA-N gallic acid Chemical compound OC(=O)C1=CC(O)=C(O)C(O)=C1 LNTHITQWFMADLM-UHFFFAOYSA-N 0.000 claims abstract description 28
- NEHMKBQYUWJMIP-UHFFFAOYSA-N chloromethane Chemical compound ClC NEHMKBQYUWJMIP-UHFFFAOYSA-N 0.000 claims abstract description 19
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims abstract description 18
- 229940074391 gallic acid Drugs 0.000 claims abstract description 14
- 235000004515 gallic acid Nutrition 0.000 claims abstract description 14
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical class CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910000027 potassium carbonate Inorganic materials 0.000 claims abstract description 9
- 229940050176 methyl chloride Drugs 0.000 claims abstract description 8
- 239000002253 acid Substances 0.000 claims abstract description 7
- 239000011230 binding agent Substances 0.000 claims abstract description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 30
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 21
- 238000004821 distillation Methods 0.000 claims description 19
- 239000012043 crude product Substances 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 14
- 238000010792 warming Methods 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 12
- 150000008642 3,4,5-trimethoxybenzoates Chemical class 0.000 claims description 9
- 239000012141 concentrate Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 8
- HZNQSWJZTWOTKM-UHFFFAOYSA-N 2,3,4-trimethoxybenzoic acid Chemical compound COC1=CC=C(C(O)=O)C(OC)=C1OC HZNQSWJZTWOTKM-UHFFFAOYSA-N 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 238000000605 extraction Methods 0.000 claims description 7
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 abstract description 5
- 230000032050 esterification Effects 0.000 abstract description 3
- 238000005886 esterification reaction Methods 0.000 abstract description 3
- 239000002904 solvent Substances 0.000 abstract description 3
- 238000011031 large-scale manufacturing process Methods 0.000 abstract 1
- 238000003786 synthesis reaction Methods 0.000 description 10
- 230000015572 biosynthetic process Effects 0.000 description 9
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 5
- 238000004128 high performance liquid chromatography Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- 239000003814 drug Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000000376 reactant Substances 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 230000007096 poisonous effect Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000010189 synthetic method Methods 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- UQVADGKRJSPTBY-UHFFFAOYSA-N 4-benzyl-5-methoxypyrimidin-2-amine Chemical compound O(C)C=1C(=NC(=NC1)N)CC1=CC=CC=C1 UQVADGKRJSPTBY-UHFFFAOYSA-N 0.000 description 1
- XWVOEFLBOSSYGM-UHFFFAOYSA-N 4-morpholinyl-(3,4,5-trimethoxyphenyl)methanone Chemical compound COC1=C(OC)C(OC)=CC(C(=O)N2CCOCC2)=C1 XWVOEFLBOSSYGM-UHFFFAOYSA-N 0.000 description 1
- FZGHWGNQHDJBME-UHFFFAOYSA-N C(C=1C(C(=O)OC)=CC=CC1)(=O)OC.[S] Chemical compound C(C=1C(C(=O)OC)=CC=CC1)(=O)OC.[S] FZGHWGNQHDJBME-UHFFFAOYSA-N 0.000 description 1
- FSRLGULMGJGKGI-BTJKTKAUSA-N Trimebutine maleate Chemical compound OC(=O)\C=C/C(O)=O.C=1C=CC=CC=1C(CC)(N(C)C)COC(=O)C1=CC(OC)=C(OC)C(OC)=C1 FSRLGULMGJGKGI-BTJKTKAUSA-N 0.000 description 1
- 238000007171 acid catalysis Methods 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 239000002249 anxiolytic agent Substances 0.000 description 1
- 230000000949 anxiolytic effect Effects 0.000 description 1
- 239000012237 artificial material Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 210000000936 intestine Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QPJVMBTYPHYUOC-UHFFFAOYSA-N methyl benzoate Chemical class COC(=O)C1=CC=CC=C1 QPJVMBTYPHYUOC-UHFFFAOYSA-N 0.000 description 1
- 150000004702 methyl esters Chemical class 0.000 description 1
- 238000007069 methylation reaction Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000007867 post-reaction treatment Methods 0.000 description 1
- 231100000004 severe toxicity Toxicity 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 210000002784 stomach Anatomy 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 229960005345 trimebutine Drugs 0.000 description 1
- 229950001577 trimetozine Drugs 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/30—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group
- C07C67/31—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by introduction of functional groups containing oxygen only in singly bound form
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/10—Preparation of carboxylic acid esters by reacting carboxylic acids or symmetrical anhydrides with ester groups or with a carbon-halogen bond
- C07C67/11—Preparation of carboxylic acid esters by reacting carboxylic acids or symmetrical anhydrides with ester groups or with a carbon-halogen bond being mineral ester groups
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The present invention provides a kind of one-step synthesis method 3, and the method for 4,5-tri-methoxybenzoate, it is using gallic acid as raw material, and with N, N dimethylformamides are that solvent carries out esterification with methyl chloride gas, and a step is made 3,4,5-tri-methoxybenzoate., need to be using potassium carbonate as acid binding agent in course of reaction.Convenient and easy, easy to operate, high-efficiency environment friendly of the invention, available for commercialized large-scale production, meets the ever-increasing market demand.
Description
Technical field
The present invention relates to technical field of chemistry, particularly a kind of synthetic method of 3,4,5- tri-methoxybenzoates.
Technical background
3,4,5- tri-methoxybenzoates, it is a kind of white crystalline solid, is important organic synthesis intermediate.
Set out with the material, multi-medicament product can be obtained, such as antibacterial medicine synergist methoxybenzyl aminopyrimidine, anxiolytic Trimetozine, intestines
Stomach medicine Trimebutine Maleate etc., it may also be used for be used as ultraviolet absorber in thermal recording medium.With chemical industry chemical industries
Continue to develop, 3,4,5- tri-methoxybenzoates there are broader market prospects, therefore, it is possible to simple efficient raw
Production 3,4,5- tri-methoxybenzoates have very big social benefit.
At present, industrially it is made frequently with two-step method, detailed process is：Using gallic acid as raw material, with dimethyl suflfate
Carry out methylation reaction and obtain 3,4,5- trimethoxybenzoic acids；Again with 3,4,5- trimethoxybenzoic acids for raw material, with methanol
Esterification is carried out under sulfuric acid catalysis, 3,4,5- tri-methoxybenzoates are made.After have document report one-step synthesis 3,
The method of 4,5- tri-methoxybenzoates, its process are：Using gallic acid as raw material, using sodium carbonate as condensing agent, with sulphur
Dimethyl phthalate reacts, and directly generates 3,4,5- tri-methoxybenzoates.
The synthetic route of above two technique is as follows：
Two-step synthesis：
Both the above synthesis technique, still suffer from many deficiencies：（1）Two-step synthesis method：The method needs the synthesis of two steps, often walks all
Purification is needed, process is cumbersome tediously long, takes time and effort, and reduces yield；During second step esterification, react for can be converse
Should, raw material reaction is incomplete, reduces yield, causes unnecessary waste；Dimethyl suflfate category severe poisonous chemicals used in reaction,
Degree of danger is high during production.（2）One-step synthesis：Two steps are merged into a step by the method, though save the numerous of middle polishing purification
Trivial process, but still continue to use the dimethyl suflfate of severe toxicity.
The content of the invention
In view of the above problems, it is an object of the invention to provide a kind of trimethoxybenzoic acid first of one-step synthesis method 3,4,5-
The method of ester, it is using chloromethanes as reactant, using potassium carbonate as acid binding agent, using DMF as solvent, and one-step synthesis 3,4,5- trimethoxies
Yl benzoic acid methyl esters, shortens reaction time, simplifies complicated processing procedure, reduces the pollution to environment.
To achieve the above object, embodiment of the present invention is：A kind of one-step synthesis method 3,4,5- trimethoxybenzoic acids
The method of methyl esters, comprises the following steps：
（1）In gallic acid, DMF is added（DMF）And acid binding agent, be cooled under stirring 10 DEG C with
Under, lead to methyl chloride gas, lead to after finishing, the ladder-elevating temperature by 40 DEG C, is warming up to 110 DEG C, question response is complete in 5h~12h immediately
Room temperature is down to after complete, carries out distillation and concentration.
（2）Add water into concentrate and be stirred continuously, be extracted with ethyl acetate three times, combining extraction liquid is dense by extract
White solid is obtained after contracting distillation, is 3,4,5- tri-methoxybenzoate crude products；
（3）3,4,5- tri-methoxybenzoate crude products are put into methanol, stirring is warming up to 60~65 DEG C, backflow 1
Room temperature is down to after hour, concentration distillation, filters, sterling is obtained after drying.
As optimization, step（1）In, the w/v of the gallic acid and DMF is 1: 20
~40, the weight ratio of gallic acid and acid binding agent is 1：0. 5~3.DMF is solvent, and acid binding agent used is
Potassium carbonate.
As optimization, step（2）In, the dosage of the water is about 1 times of the volume of concentrate.
As optimization, step（3）In, the w/v of described 3,4,5- tri-methoxybenzoate crude products and methanol
For 1：2~3 (W/V).
The present invention technical route be：
The present invention solves that reaction time in the synthetic methods of existing 3,4,5- tri-methoxybenzoates is long, middle
Reason process it is complicated it is tediously long, yield is relatively low, reaction in agents useful for same be poisonous reagent, it is big to people and environmental hazard the problems such as, have
Following good effect：
1st, compared with two-step synthesis method, the tri-methoxybenzoate of method one-step synthesis 3,4,5-, production is greatly shortened
In the cycle, save time and cost.
When being produced with two-step method, each step will be refined, purified, and process is complicated tediously long, takes time and effort, and substantially reduces
The yield of product.Two steps are changed into a step by new synthesis technique, simplify complicated producing process, by yield by before
80% brings up to 85% or so, has saved cost, greatlys save artificial material resources.
2nd, using chloromethanes as reactant, pollution is reduced.
In traditional preparation technology, an either step is produced or two steps are produced, will be using dimethyl suflfate as reaction
Thing.And dimethyl suflfate is a kind of very strong chemicals of toxicity, all there is very strong toxic to people or to environment, produce
During degree of danger it is big；New technology then changes traditional preparation method, uses chloromethanes as reactant, one-step synthesis, greatly
The big toxic reduced to people and environment, it is simple and easy.
3rd, the post-reaction treatment is easy, and product is easily isolated, efficiently convenient.
4th, organic solvent used can be reclaimed fully after simple process in producing, and low-loss, be recycled, reduction is produced into
This, discarded object is few, energy-conserving and environment-protective.
Embodiment
With reference to specific embodiment, the present invention will be further described：Following each embodiments be merely to illustrate the present invention and
Not limitation of the present invention.Agents useful for same and consersion unit of the present invention are commercially available prod.
Embodiment 1:One-step synthesis method 3,4, the method for 5- tri-methoxybenzoates, specific method and step are：
（1）Gallic acid 20g, DMF500ml, potassium carbonate 20g are added in a four-hole bottle, be cooled under stirring 10 DEG C with
Under, lead to methyl chloride gas 50g, lead to after finishing immediately by 40 DEG C of ladder-elevating temperatures, be warming up to 110 DEG C in 12h, be then down to room temperature, it is dense
Contracting distillation；
（2）Add water 300mL into concentrate, and be stirred continuously, be extracted with ethyl acetate three times, combining extraction liquid, will extract
White solid is obtained after taking liquid concentration distillation, is crude product.
（3）Crude product is put into 100mL methanol, stirring is warming up to 60~65 DEG C, and backflow is down to room temperature after 1 hour.Concentration
Distillation, filter, sterling 22.5g, yield 84.6% are obtained after drying, content is detected as 99.61% through HPLC, fusing point：82℃~83
℃。
Embodiment 2:One-step synthesis method 3,4, the method for 5- tri-methoxybenzoates, specific method and step are：
（1）Gallic acid 40g, DMF1200mL, potassium carbonate 100g are added in a four-hole bottle, 10 DEG C are cooled under stirring
Hereinafter, lead to methyl chloride gas 100g, lead to after finishing immediately by 40 DEG C of ladder-elevating temperatures, be warming up to 110 DEG C in 10h, be then down to room temperature,
Concentration distillation；
（2）Add water 600mL into concentrate, and be stirred continuously, be extracted with ethyl acetate three times, combining extraction liquid, will extract
White solid is obtained after taking liquid concentration distillation, is crude product.
（3）Crude product is put into 200mL methanol, stirring is warming up to 60~65 DEG C, and backflow is down to room temperature after 1 hour.Filter,
Sterling 45.4g, yield 85.3% are obtained after drying, content is detected as 99.57% through HPLC, fusing point：82℃~83℃.
Embodiment 3:One-step synthesis method 3,4, the method for 5- tri-methoxybenzoates, specific method and step are：
（1）Gallic acid 40g is added in a four-hole bottle, DMF1500mL, potassium carbonate 120g, 10 DEG C are cooled under stirring
Hereinafter, lead to methyl chloride gas 100g, lead to after finishing immediately by 40 DEG C of ladder-elevating temperatures, be warming up to 110 DEG C in 5h, be then down to room temperature,
Concentration distillation；
（2）Add water 600mL into concentrate, and be stirred continuously, be extracted with ethyl acetate three times, combining extraction liquid, will extract
White solid is obtained after taking liquid concentration distillation, is crude product.
（3）Crude product is put into 200mL methanol, stirring is warming up to 60~65 DEG C, and backflow is down to room temperature after 1 hour.Concentration
Distillation, filter, sterling 44.8g, yield 84.2% are obtained after drying, content is detected as 99.88% through HPLC, fusing point：83℃~84
℃。
Embodiment 4:One-step synthesis method 3,4, the method for 5- tri-methoxybenzoates, specific method and step are：
（1）Gallic acid 60g is added in a four-hole bottle, DMF2000mL, potassium carbonate 120g, 10 DEG C are cooled under stirring
Hereinafter, lead to methyl chloride gas 150g, lead to after finishing immediately by 40 DEG C of ladder-elevating temperatures, 110 DEG C are warming up in 6h, is then down to room
Temperature, concentration distillation；
（2）Add water 900mL into concentrate, and be stirred continuously, be extracted with ethyl acetate three times, combining extraction liquid, will extract
White solid is obtained after taking liquid concentration distillation, is crude product.
（3）Crude product is put into 400mL methanol, stirring is warming up to 60~65 DEG C, and backflow is down to room temperature after 1 hour.Concentration
Distillation, filter, sterling 67.7g, yield 84.8% are obtained after drying, content is detected as 99.70% through HPLC, fusing point：83℃~84
℃。
Embodiment 5:One-step synthesis method 3,4, the method for 5- tri-methoxybenzoates, specific method and step are：
（1）Gallic acid 120g is added in a four-hole bottle, DMF4000mL, potassium carbonate 240g, 10 DEG C are cooled under stirring
Hereinafter, lead to methyl chloride gas 300g, lead to after finishing immediately by 40 DEG C of ladder-elevating temperatures, 110 DEG C are warming up in 6h, is then down to room
Temperature, concentration distillation；
（2）Add water 2000mL into concentrate, and be stirred continuously, be extracted with ethyl acetate three times, combining extraction liquid, will extract
White solid is obtained after taking liquid concentration distillation, is crude product.
（3）Crude product is put into 700mL methanol, stirring is warming up to 60~65 DEG C, and backflow is down to room temperature after 1 hour.Concentration
Distillation, filter, sterling 136.2g, yield 85.3% are obtained after drying, content is detected as 99.55% through HPLC, fusing point：81℃~82
℃。
Claims (5)
- A kind of 1. method of the tri-methoxybenzoate of one-step synthesis method 3,4,5-, it is characterised in that comprise the following steps：（1）In gallic acid, DMF is added（DMF）And acid binding agent, less than 10 DEG C are cooled under stirring, is led to Methyl chloride gas, lead to after finishing, the ladder-elevating temperature by 40 DEG C, is warming up to 110 DEG C, after question response is complete in 5h~12h immediately Room temperature is down to, carries out distillation and concentration；（2）Add water into concentrate and be stirred continuously, be extracted with ethyl acetate three times, combining extraction liquid, extract is concentrated and steamed White solid is obtained after evaporating, is 3,4,5- tri-methoxybenzoate crude products；（3）3,4,5- tri-methoxybenzoate crude products are put into methanol, stirring is warming up to 60~65 DEG C, flows back 1 hour After be down to room temperature, concentration distillation, filter, after drying sterling.
- 2. the method for the tri-methoxybenzoate of one-step synthesis method 3,4,5- according to claim 1, it is characterised in that Step（1）In, the w/v of the gallic acid and DMF is 1:20~40, gallic acid and tie up The weight ratio of sour agent is 1：0. 5~3.
- 3. the method for the tri-methoxybenzoate of one-step synthesis method 3,4,5- according to claim 1 or 2, its feature exist In acid binding agent used is potassium carbonate.
- 4. the method for the tri-methoxybenzoate of one-step synthesis method 3,4,5- according to claim 1, it is characterised in that Step（2）In, the dosage of the water is about 1 times of the volume of concentrate.
- 5. the method for the tri-methoxybenzoate of one-step synthesis method 3,4,5- according to claim 1, it is characterised in that Step（3）In, the w/v of described 3,4,5- tri-methoxybenzoate crude products and methanol is 1：2~3.
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Denomination of invention: A one-step synthesis method of 3,4,5-trimethoxy Methyl benzoate Effective date of registration: 20230628 Granted publication date: 20180330 Pledgee: Bank of Communications Co.,Ltd. Zhangjiajie branch Pledgor: JIURUI BIOLOGY & CHEMISTRY CO.,LTD. Registration number: Y2023980046143 |
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Granted publication date: 20180330 Pledgee: Bank of Communications Co.,Ltd. Zhangjiajie branch Pledgor: JIURUI BIOLOGY & CHEMISTRY CO.,LTD. Registration number: Y2023980046143 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A one-step method for synthesizing 3,4,5-trimethoxybenzoate methyl ester Granted publication date: 20180330 Pledgee: Bank of Communications Co.,Ltd. Zhangjiajie branch Pledgor: JIURUI BIOLOGY & CHEMISTRY CO.,LTD. Registration number: Y2024980025097 |